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Appendix A: Calibration Options
NI 5450 Calibration Procedure
Table 21. NI 5153/5154 Input Parameters for
External Trigger Channel External Adjustment
Iteration
1
2
External calibration involves verification and if necessary, adjustment and
reverification. Adjustment is the process of measuring and compensating
for device performance to improve the measurement accuracy. Performing
an adjustment updates the calibration date, effectively resetting the
calibration interval. The device is warranted to meet or exceed its published
specifications for the duration of the calibration interval. Verification is the
process of testing the device to ensure that the measurement accuracy is
within certain specifications. Verification can be used to ensure that the
adjustment process was successful or to determine if the adjustment
process needs to be performed at all.
This document provides two sets of test limits for most verification
stages—the calibration test limits and the published specifications. The
calibration test limits are more restrictive than the published specifications.
If all of the measurement errors determined during verification fall within
the calibration test limits, the device is warranted to meet or exceed its
published specifications for a full calibration interval (two years). For this
reason, you must verify against the calibration test limits when performing
verification after adjustment. If all of the measurement errors determined
during verification fall within the published specifications, but not within
the calibration test limits, the device is meeting its published specifications.
However, the device will not necessarily remain within these specifications
for an additional two years. The device will meet published
specifications for the remainder of the current calibration interval. In
this case, you can perform an adjustment if you want to further improve
the measurement accuracy or reset the calibration interval. If some
measurement errors determined during verification do not fall within the
published specifications, you must perform an adjustment to restore the
device operation to its published specifications.
The
Complete Calibration
procedure. The
Optional Calibration
procedures that allow you to skip adjustment if the device already meets
its calibration test limits or published specifications.
Range (V
)
pp
10
10
section describes the recommended calibration
section describes alternative
64
Input (V)
4.5
0
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